Ellsbury is only starting to scratch the surface with his talent. Last year he was much more consistent at the plate. He speed is a unique weapon for the Red Sox who have never had a guy like this. Every hit is essentially at least a double with his stealing ability. With Pedroia hitting behind him, he'll be standing on 3B with less than 2 out all the time for VMart.
As for the lineup, against righties I think the bottom 3 will be Lowell(if he's still here), Cameron and Scutaro. Against lefties it will be Lowell, Cameron, Varitek and Scutaro. Let's not forget that the lineup will get shorter on those days when Tito finds it necessary to keep Kotchman fresh. Neither of those lineups is good enough to beat the Yankees in the regular season or the playoffs. We still do not have a reliable cleanup hitter, and the lineup will be much weaker without Bay. They need another big bat.